21203122202 has 8 divisors (see below), whose sum is σ = 32580407412. Its totient is φ = 10342986400.

The previous prime is 21203122183. The next prime is 21203122207. The reversal of 21203122202 is 20222130212.

It can be written as a sum of positive squares in 2 ways, for example, as 16399107481 + 4804014721 = 128059^2 + 69311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21203122202² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21203122207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129287249 + ... + 129287412.

Almost surely, 2^21203122202 is an apocalyptic number.

21203122202 is a deficient number, since it is larger than the sum of its proper divisors (11377285210).

21203122202 is a wasteful number, since it uses less digits than its factorization.

21203122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258574704.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21203122202 its reverse (20222130212), we get a palindrome (41425252414).

The spelling of 21203122202 in words is "twenty-one billion, two hundred three million, one hundred twenty-two thousand, two hundred two".